1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.settings;
18
19import com.android.internal.view.RotationPolicy;
20import com.android.settings.notification.DropDownPreference;
21import com.android.settings.notification.DropDownPreference.Callback;
22import com.android.settings.search.BaseSearchIndexProvider;
23import com.android.settings.search.Indexable;
24
25import static android.provider.Settings.Secure.DOZE_ENABLED;
26import static android.provider.Settings.Secure.WAKE_GESTURE_ENABLED;
27import static android.provider.Settings.System.SCREEN_BRIGHTNESS_MODE;
28import static android.provider.Settings.System.SCREEN_BRIGHTNESS_MODE_AUTOMATIC;
29import static android.provider.Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL;
30import static android.provider.Settings.System.SCREEN_OFF_TIMEOUT;
31
32import android.app.Activity;
33import android.app.ActivityManagerNative;
34import android.app.Dialog;
35import android.app.admin.DevicePolicyManager;
36import android.content.ContentResolver;
37import android.content.Context;
38import android.content.res.Configuration;
39import android.content.res.Resources;
40import android.hardware.Sensor;
41import android.hardware.SensorManager;
42import android.os.Build;
43import android.os.Bundle;
44import android.os.RemoteException;
45import android.os.SystemProperties;
46import android.preference.ListPreference;
47import android.preference.Preference;
48import android.preference.Preference.OnPreferenceClickListener;
49import android.preference.PreferenceScreen;
50import android.preference.SwitchPreference;
51import android.provider.SearchIndexableResource;
52import android.provider.Settings;
53import android.text.TextUtils;
54import android.util.Log;
55
56import java.util.ArrayList;
57import java.util.List;
58
59public class DisplaySettings extends SettingsPreferenceFragment implements
60        Preference.OnPreferenceChangeListener, OnPreferenceClickListener, Indexable {
61    private static final String TAG = "DisplaySettings";
62
63    /** If there is no setting in the provider, use this. */
64    private static final int FALLBACK_SCREEN_TIMEOUT_VALUE = 30000;
65
66    private static final String KEY_SCREEN_TIMEOUT = "screen_timeout";
67    private static final String KEY_FONT_SIZE = "font_size";
68    private static final String KEY_SCREEN_SAVER = "screensaver";
69    private static final String KEY_LIFT_TO_WAKE = "lift_to_wake";
70    private static final String KEY_DOZE = "doze";
71    private static final String KEY_AUTO_BRIGHTNESS = "auto_brightness";
72    private static final String KEY_AUTO_ROTATE = "auto_rotate";
73
74    private static final int DLG_GLOBAL_CHANGE_WARNING = 1;
75
76    private WarnedListPreference mFontSizePref;
77
78    private final Configuration mCurConfig = new Configuration();
79
80    private ListPreference mScreenTimeoutPreference;
81    private Preference mScreenSaverPreference;
82    private SwitchPreference mLiftToWakePreference;
83    private SwitchPreference mDozePreference;
84    private SwitchPreference mAutoBrightnessPreference;
85
86    @Override
87    public void onCreate(Bundle savedInstanceState) {
88        super.onCreate(savedInstanceState);
89        final Activity activity = getActivity();
90        final ContentResolver resolver = activity.getContentResolver();
91
92        addPreferencesFromResource(R.xml.display_settings);
93
94        mScreenSaverPreference = findPreference(KEY_SCREEN_SAVER);
95        if (mScreenSaverPreference != null
96                && getResources().getBoolean(
97                        com.android.internal.R.bool.config_dreamsSupported) == false) {
98            getPreferenceScreen().removePreference(mScreenSaverPreference);
99        }
100
101        mScreenTimeoutPreference = (ListPreference) findPreference(KEY_SCREEN_TIMEOUT);
102        final long currentTimeout = Settings.System.getLong(resolver, SCREEN_OFF_TIMEOUT,
103                FALLBACK_SCREEN_TIMEOUT_VALUE);
104        mScreenTimeoutPreference.setValue(String.valueOf(currentTimeout));
105        mScreenTimeoutPreference.setOnPreferenceChangeListener(this);
106        disableUnusableTimeouts(mScreenTimeoutPreference);
107        updateTimeoutPreferenceDescription(currentTimeout);
108
109        mFontSizePref = (WarnedListPreference) findPreference(KEY_FONT_SIZE);
110        mFontSizePref.setOnPreferenceChangeListener(this);
111        mFontSizePref.setOnPreferenceClickListener(this);
112
113        if (isAutomaticBrightnessAvailable(getResources())) {
114            mAutoBrightnessPreference = (SwitchPreference) findPreference(KEY_AUTO_BRIGHTNESS);
115            mAutoBrightnessPreference.setOnPreferenceChangeListener(this);
116        } else {
117            removePreference(KEY_AUTO_BRIGHTNESS);
118        }
119
120        if (isLiftToWakeAvailable(activity)) {
121            mLiftToWakePreference = (SwitchPreference) findPreference(KEY_LIFT_TO_WAKE);
122            mLiftToWakePreference.setOnPreferenceChangeListener(this);
123        } else {
124            removePreference(KEY_LIFT_TO_WAKE);
125        }
126
127        if (isDozeAvailable(activity)) {
128            mDozePreference = (SwitchPreference) findPreference(KEY_DOZE);
129            mDozePreference.setOnPreferenceChangeListener(this);
130        } else {
131            removePreference(KEY_DOZE);
132        }
133
134        if (RotationPolicy.isRotationLockToggleVisible(activity)) {
135            DropDownPreference rotatePreference =
136                    (DropDownPreference) findPreference(KEY_AUTO_ROTATE);
137            rotatePreference.addItem(activity.getString(R.string.display_auto_rotate_rotate),
138                    false);
139            int rotateLockedResourceId;
140            // The following block sets the string used when rotation is locked.
141            // If the device locks specifically to portrait or landscape (rather than current
142            // rotation), then we use a different string to include this information.
143            if (allowAllRotations(activity)) {
144                rotateLockedResourceId = R.string.display_auto_rotate_stay_in_current;
145            } else {
146                if (RotationPolicy.getRotationLockOrientation(activity)
147                        == Configuration.ORIENTATION_PORTRAIT) {
148                    rotateLockedResourceId =
149                            R.string.display_auto_rotate_stay_in_portrait;
150                } else {
151                    rotateLockedResourceId =
152                            R.string.display_auto_rotate_stay_in_landscape;
153                }
154            }
155            rotatePreference.addItem(activity.getString(rotateLockedResourceId), true);
156            rotatePreference.setSelectedItem(RotationPolicy.isRotationLocked(activity) ?
157                    1 : 0);
158            rotatePreference.setCallback(new Callback() {
159                @Override
160                public boolean onItemSelected(int pos, Object value) {
161                    RotationPolicy.setRotationLock(activity, (Boolean) value);
162                    return true;
163                }
164            });
165        } else {
166            removePreference(KEY_AUTO_ROTATE);
167        }
168    }
169
170    private static boolean allowAllRotations(Context context) {
171        return Resources.getSystem().getBoolean(
172                com.android.internal.R.bool.config_allowAllRotations);
173    }
174
175    private static boolean isLiftToWakeAvailable(Context context) {
176        SensorManager sensors = (SensorManager) context.getSystemService(Context.SENSOR_SERVICE);
177        return sensors != null && sensors.getDefaultSensor(Sensor.TYPE_WAKE_GESTURE) != null;
178    }
179
180    private static boolean isDozeAvailable(Context context) {
181        String name = Build.IS_DEBUGGABLE ? SystemProperties.get("debug.doze.component") : null;
182        if (TextUtils.isEmpty(name)) {
183            name = context.getResources().getString(
184                    com.android.internal.R.string.config_dozeComponent);
185        }
186        return !TextUtils.isEmpty(name);
187    }
188
189    private static boolean isAutomaticBrightnessAvailable(Resources res) {
190        return res.getBoolean(com.android.internal.R.bool.config_automatic_brightness_available);
191    }
192
193    private void updateTimeoutPreferenceDescription(long currentTimeout) {
194        ListPreference preference = mScreenTimeoutPreference;
195        String summary;
196        if (currentTimeout < 0) {
197            // Unsupported value
198            summary = "";
199        } else {
200            final CharSequence[] entries = preference.getEntries();
201            final CharSequence[] values = preference.getEntryValues();
202            if (entries == null || entries.length == 0) {
203                summary = "";
204            } else {
205                int best = 0;
206                for (int i = 0; i < values.length; i++) {
207                    long timeout = Long.parseLong(values[i].toString());
208                    if (currentTimeout >= timeout) {
209                        best = i;
210                    }
211                }
212                summary = preference.getContext().getString(R.string.screen_timeout_summary,
213                        entries[best]);
214            }
215        }
216        preference.setSummary(summary);
217    }
218
219    private void disableUnusableTimeouts(ListPreference screenTimeoutPreference) {
220        final DevicePolicyManager dpm =
221                (DevicePolicyManager) getActivity().getSystemService(
222                Context.DEVICE_POLICY_SERVICE);
223        final long maxTimeout = dpm != null ? dpm.getMaximumTimeToLock(null) : 0;
224        if (maxTimeout == 0) {
225            return; // policy not enforced
226        }
227        final CharSequence[] entries = screenTimeoutPreference.getEntries();
228        final CharSequence[] values = screenTimeoutPreference.getEntryValues();
229        ArrayList<CharSequence> revisedEntries = new ArrayList<CharSequence>();
230        ArrayList<CharSequence> revisedValues = new ArrayList<CharSequence>();
231        for (int i = 0; i < values.length; i++) {
232            long timeout = Long.parseLong(values[i].toString());
233            if (timeout <= maxTimeout) {
234                revisedEntries.add(entries[i]);
235                revisedValues.add(values[i]);
236            }
237        }
238        if (revisedEntries.size() != entries.length || revisedValues.size() != values.length) {
239            final int userPreference = Integer.parseInt(screenTimeoutPreference.getValue());
240            screenTimeoutPreference.setEntries(
241                    revisedEntries.toArray(new CharSequence[revisedEntries.size()]));
242            screenTimeoutPreference.setEntryValues(
243                    revisedValues.toArray(new CharSequence[revisedValues.size()]));
244            if (userPreference <= maxTimeout) {
245                screenTimeoutPreference.setValue(String.valueOf(userPreference));
246            } else if (revisedValues.size() > 0
247                    && Long.parseLong(revisedValues.get(revisedValues.size() - 1).toString())
248                    == maxTimeout) {
249                // If the last one happens to be the same as the max timeout, select that
250                screenTimeoutPreference.setValue(String.valueOf(maxTimeout));
251            } else {
252                // There will be no highlighted selection since nothing in the list matches
253                // maxTimeout. The user can still select anything less than maxTimeout.
254                // TODO: maybe append maxTimeout to the list and mark selected.
255            }
256        }
257        screenTimeoutPreference.setEnabled(revisedEntries.size() > 0);
258    }
259
260    int floatToIndex(float val) {
261        String[] indices = getResources().getStringArray(R.array.entryvalues_font_size);
262        float lastVal = Float.parseFloat(indices[0]);
263        for (int i=1; i<indices.length; i++) {
264            float thisVal = Float.parseFloat(indices[i]);
265            if (val < (lastVal + (thisVal-lastVal)*.5f)) {
266                return i-1;
267            }
268            lastVal = thisVal;
269        }
270        return indices.length-1;
271    }
272
273    public void readFontSizePreference(ListPreference pref) {
274        try {
275            mCurConfig.updateFrom(ActivityManagerNative.getDefault().getConfiguration());
276        } catch (RemoteException e) {
277            Log.w(TAG, "Unable to retrieve font size");
278        }
279
280        // mark the appropriate item in the preferences list
281        int index = floatToIndex(mCurConfig.fontScale);
282        pref.setValueIndex(index);
283
284        // report the current size in the summary text
285        final Resources res = getResources();
286        String[] fontSizeNames = res.getStringArray(R.array.entries_font_size);
287        pref.setSummary(String.format(res.getString(R.string.summary_font_size),
288                fontSizeNames[index]));
289    }
290
291    @Override
292    public void onResume() {
293        super.onResume();
294        updateState();
295    }
296
297    @Override
298    public Dialog onCreateDialog(int dialogId) {
299        if (dialogId == DLG_GLOBAL_CHANGE_WARNING) {
300            return Utils.buildGlobalChangeWarningDialog(getActivity(),
301                    R.string.global_font_change_title,
302                    new Runnable() {
303                        public void run() {
304                            mFontSizePref.click();
305                        }
306                    });
307        }
308        return null;
309    }
310
311    private void updateState() {
312        readFontSizePreference(mFontSizePref);
313        updateScreenSaverSummary();
314
315        // Update auto brightness if it is available.
316        if (mAutoBrightnessPreference != null) {
317            int brightnessMode = Settings.System.getInt(getContentResolver(),
318                    SCREEN_BRIGHTNESS_MODE, SCREEN_BRIGHTNESS_MODE_MANUAL);
319            mAutoBrightnessPreference.setChecked(brightnessMode != SCREEN_BRIGHTNESS_MODE_MANUAL);
320        }
321
322        // Update lift-to-wake if it is available.
323        if (mLiftToWakePreference != null) {
324            int value = Settings.Secure.getInt(getContentResolver(), WAKE_GESTURE_ENABLED, 0);
325            mLiftToWakePreference.setChecked(value != 0);
326        }
327
328        // Update doze if it is available.
329        if (mDozePreference != null) {
330            int value = Settings.Secure.getInt(getContentResolver(), DOZE_ENABLED, 1);
331            mDozePreference.setChecked(value != 0);
332        }
333    }
334
335    private void updateScreenSaverSummary() {
336        if (mScreenSaverPreference != null) {
337            mScreenSaverPreference.setSummary(
338                    DreamSettings.getSummaryTextWithDreamName(getActivity()));
339        }
340    }
341
342    public void writeFontSizePreference(Object objValue) {
343        try {
344            mCurConfig.fontScale = Float.parseFloat(objValue.toString());
345            ActivityManagerNative.getDefault().updatePersistentConfiguration(mCurConfig);
346        } catch (RemoteException e) {
347            Log.w(TAG, "Unable to save font size");
348        }
349    }
350
351    @Override
352    public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
353        return super.onPreferenceTreeClick(preferenceScreen, preference);
354    }
355
356    @Override
357    public boolean onPreferenceChange(Preference preference, Object objValue) {
358        final String key = preference.getKey();
359        if (KEY_SCREEN_TIMEOUT.equals(key)) {
360            try {
361                int value = Integer.parseInt((String) objValue);
362                Settings.System.putInt(getContentResolver(), SCREEN_OFF_TIMEOUT, value);
363                updateTimeoutPreferenceDescription(value);
364            } catch (NumberFormatException e) {
365                Log.e(TAG, "could not persist screen timeout setting", e);
366            }
367        }
368        if (KEY_FONT_SIZE.equals(key)) {
369            writeFontSizePreference(objValue);
370        }
371        if (preference == mAutoBrightnessPreference) {
372            boolean auto = (Boolean) objValue;
373            Settings.System.putInt(getContentResolver(), SCREEN_BRIGHTNESS_MODE,
374                    auto ? SCREEN_BRIGHTNESS_MODE_AUTOMATIC : SCREEN_BRIGHTNESS_MODE_MANUAL);
375        }
376        if (preference == mLiftToWakePreference) {
377            boolean value = (Boolean) objValue;
378            Settings.Secure.putInt(getContentResolver(), WAKE_GESTURE_ENABLED, value ? 1 : 0);
379        }
380        if (preference == mDozePreference) {
381            boolean value = (Boolean) objValue;
382            Settings.Secure.putInt(getContentResolver(), DOZE_ENABLED, value ? 1 : 0);
383        }
384        return true;
385    }
386
387    @Override
388    public boolean onPreferenceClick(Preference preference) {
389        if (preference == mFontSizePref) {
390            if (Utils.hasMultipleUsers(getActivity())) {
391                showDialog(DLG_GLOBAL_CHANGE_WARNING);
392                return true;
393            } else {
394                mFontSizePref.click();
395            }
396        }
397        return false;
398    }
399
400    public static final Indexable.SearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
401            new BaseSearchIndexProvider() {
402                @Override
403                public List<SearchIndexableResource> getXmlResourcesToIndex(Context context,
404                        boolean enabled) {
405                    ArrayList<SearchIndexableResource> result =
406                            new ArrayList<SearchIndexableResource>();
407
408                    SearchIndexableResource sir = new SearchIndexableResource(context);
409                    sir.xmlResId = R.xml.display_settings;
410                    result.add(sir);
411
412                    return result;
413                }
414
415                @Override
416                public List<String> getNonIndexableKeys(Context context) {
417                    ArrayList<String> result = new ArrayList<String>();
418                    if (!context.getResources().getBoolean(
419                            com.android.internal.R.bool.config_dreamsSupported)) {
420                        result.add(KEY_SCREEN_SAVER);
421                    }
422                    if (!isAutomaticBrightnessAvailable(context.getResources())) {
423                        result.add(KEY_AUTO_BRIGHTNESS);
424                    }
425                    if (!isLiftToWakeAvailable(context)) {
426                        result.add(KEY_LIFT_TO_WAKE);
427                    }
428                    if (!isDozeAvailable(context)) {
429                        result.add(KEY_DOZE);
430                    }
431                    if (!RotationPolicy.isRotationLockToggleVisible(context)) {
432                        result.add(KEY_AUTO_ROTATE);
433                    }
434                    return result;
435                }
436            };
437}
438